8 Best Standalone Smartwatch with SIM card, 4G LTE, WIFI Support for 2021

Top 8 Best Standalone Smartwatch with SIM card, 4G LTE, WIFI Support for 2021

With a lot of options for smartwatches in the market. One of the most popular categories is the standalone smartwatch. There are numbers of users who are interested more in independent smartwatches especially those who want to have a second communication device.

This type of wearable caters to those who have a busy life, and don’t want to miss any notifications while they are doing any activities. A standalone smartwatch is very beneficial to those who have outdoor activities such as hiking, traveling and other similar activities. If you are interested in getting one, we have a list below of some of the best smartwatches with SIM functionality. The options below are removable SIM card, eSIM and preloaded SIM from a network company.

All of the wearables below do have support for 4G connectivity. Complete with messaging and calls, they run different operating systems such as Wear OS, Tizen for wearables, fork Android OS. See our list below complete with specifications and reasons why we pick the device.

What is a Standalone Smartwatch?

Why Buy a Standalone Smartwatch

The Disadvantages of Standalone Smartwatch

With SIM card slot Smartwatches

Pre-Installed/eSIM smartwatches

8 Best Standalone Smartwatch for 2021
8 Best Standalone Smartwatch for 2021

What is a Standalone Smartwatch?

A standalone smartwatch is a device that is usually equipped with SIM card, either a removable SIM, preloaded or eSIM. It can receive calls and messages independently, as well as send messages without being connected to your smartphone. It works independently working like a cellular phone, with apps for messaging, but with additional features such sports functions, and other health features.

You Might be Interested: Best Big Display Smartwatch of 2021

Why Buy a Standalone smartwatch?

With a lot of options for smartwatches, one of the sections that have a huge following is the standalone smartwatches. It is a popular model of wearables especially for those who would love to have a wearable independent of their smartphone. What are the benefits of having a standalone device, why buy a standalone smartwatch?

One of the main advantages of having a standalone smartwatch is that you can receive notifications calls or messages directly from your device without having to connect it to your phone. No need to take bring or take the phone out of your phone pocket or bag.

You can read your messages, directly from the smartwatch, and initiate call or send messages. It is a very useful function as suggested by those who love outdoors such as hikers, cyclist and other users with similar activities

The Disadvantages of a Standalone smartwatch

There are a lot of benefits to the standalone smartwatch. They cost more compared to a regular tethered smartwatch but they have a lot of benefits that is not available in support smartwatch. But one of the main disadvantages of the standalone smartwatch that until now we see a very little improvement is the battery life.

Standalone smartwatches have a short battery life, they only last up to 2-3 days with normal usage. And about a day with call and messages activated, and less than that when GPS is used extensively. There are other models that implement options such as watch mode to give it more juice, but so far still far from the usual support smartwatch.

Low waterproof rating, this is another issue with standalone smartwatches. This is especially to smartwatches with a removable SIM card. If you want a good full waterproof version, a smartwatch with eSIM and preloaded SIM is much better.

DM100 Smartwatch

DM100 Smartwatch – A Wide Screen Wearable

This is the latest so far for the year 2021, the DM100 smartwatch. Option for the smartwatch is a 1 GB of storage space and 32 GB of storage Similar to the lists of smartwatches here, the smartwatch has a wide screen display. It has a 2.86” inch IPS LCD with a 640 x 480 pixel resolution It is a full touch screen display with a bright, sharp screen.

The body has a thin form factor making it light and with zinc alloy body with slim bezel looking like a small smartphone on your wrist. It runs the Android 7.1 operating system with its MT6739 Quadcore processor. It is fast and with smooth operation, no worries about downloading popular apps and running it on the DM100 smartwatch. In fact, I have once encountered a demo where the user downloaded the popular Mobile Legend on the device, so far it runs smoothly and the graphics are ok.

With its Android OS, the DM100 is equipped with nano-SIM slot, you can have an independent call and messages on the smartwatch. No need to connect it to your phone. Similar to Ticwris Max, the smartwatch has a g-sensor, heart rate monitor and built-in GPS.

Aside from nano-SIM support, the DM100 smartwatch has a WIFI support. You can directly connect to a WIFI connection and browse the web with its built-in browser or watch Youtube videos by downloading the Youtube app available in Google Play.

In just a single charge, it can last up to 1to 2 days depending on the usage. The 1200 mAh battery last longer if GPS and other sensors are not activated

Why We Like it

  • Easy to Access menus
  • Wide screen display
  • Large Battery Capacity
  • A good alternative for your smartphone
DM100 Smartwatch Specifications at a Glance

Display: 2.86” inch Screen with full touch operation

Processor: MT6739 Quadcore processor

Memory: 1 GB and 16 GB / 3 GB and 32 GB version

Camera: 5 MP

Connectivity: 4G nano SIM, WIFI, Bluetooth 4.0

Battery: 2700 mAh battery

4G LTE Connectivity: nano SIM removable

LEMFO S21 Smartwatch – Sporty and Light 

It is also one of the latest in the market, the LEMFO S21 smartwatch. Not only the newest from the list but also one of the most affordable 4G smartwatches. The LEMFO S21 smartwatch has a rectangular design, it has a sleek metal body with a single physical button on the side.

It has a sleek metal body with a single physical button on the side. If the wide DM100 smartwatch is not your thing, the small form factor S21 is the one to get. The wearable has a trendy design, although it is a bit thick about 15 mm compared to the usual thickness of a smartwatch that is around 10 mm. This is due to the 4G hardware added, the smartwatch still looks fashionable and very sporty.


The wearable has a sporty watch strap with stainless steel buckle, it is interchangeable to other third party straps with its quick-release pin feature. From the design you can see the speaker and mic hole but still according to its product page. The wearable has an IP68 waterproof rating, making it full proof water and dust proof.

For the display, the LEMFO S21 smartwatch has a 1.75″ inch IPS LCD screen display with a 320 x 385 pixel resolution. It is a full touch screen display with a sharp and crisp colors. With regards to its 4G connectivity, the wearable has a nano SIM slot available in the side of the smartwatch. It supports GSM/WCDMA to LTE-TDD connectivity. It also has WIFI support, as well as Bluetooth 5.0 connectivity.

What we like about the LEMFO S21 smartwatch is its dual CPU + dual system power-saving feature. It has SC9832 CPU + NRF52832 processor with 16 GB of storage space. It supports Google Play app, you can download popular apps, for your smartwatch.

Why We Like it

  • Small form factor with sporty design
  • Dual Process and Power Saving feature
  • Dual Positioning system GPS and GLONASS
  • Long Standby time
LEMFO S21 smartwatch Specifications at a Glance

Display: 1.75” inch IPS LCD 320 x 385 pixels

Operating System: Android 10.0

Processor: MTK9832 processor

Memory: 1 GB and 16 GB

Camera: 2 MP

Connectivity: 4G nano SIM, WIFI, Bluetooth 5.0

Battery: 700 mAh battery

4G LTE Connectivity: nano SIM removable

Kospet Brave Smartwatch – Sporty And Classy

For simple approach, and you want to smartwatch to look like a classic wristwatch. The Kospet Brave offers this type of style. The smartwatch has a simple design, clean bezel with two physical buttons on the side.


it has a classic clean-looking zinc alloy body accompanied by a sporty silicon watch strap. It has premium/corporate look with IP68 waterproof rating.

Running MediaTek MTK6737 Quad Core processor with 2 GB of RAM and 16 GB of ROM The smartwatch has several health and fitness functions. It is the only smartwatch from the list with blood pressure monitoring.

For connectivity, it supports Dual 4G LTE network, it has TDD LTE and FDD LTE 4G network and supports 23 network, frequency bands. Have an independent call and messages. But you can also use the smartwatch as a support device for your smartphone and receive calls via Bluetooth connectivity. Additional connection are WIFI 2.4GHz 802.11 b/g/n, Bluetooth 4.0, GPS/A-GPS.

Why We Like it

  • Dual 4G LTE network
  • Supports Bluetooth call aside from independent calls
  • Good Waterproof rating
Kospet Brave Smartwatch Specifications at a Glance

Display: 1.3″ inch IPS LCD with full touch operation

Processor: MTK6737 Quad Core processor

Memory: 2 GB and 16 GB

Connectivity: 4G nano SIM, WIFI, Bluetooth 4.0

Battery: 620 mAh battery

4G LTE Connectivity: nano SIM removable

TicWris Max S Smartwatch – Just the Right Size for a mini phone

If the DM101 is much bigger, but you still want the same style, a smartwatch that looks like a smartphone. The TicWris Max S smartwatch. It has a much smaller body but the display is big enough for to display most of the contents without the need of scrolling or tapping on the next page. The design of the smartwatch, thinner, lighter I think is the size of the smartwatch is a sweet spot. It is not too big similar to DM101 and not small either, just the right size.


The TicWris Max S smartwatch has a metal rectangular body with a simple clean design. It has two physical buttons, a dual camera, a front camera and side camera for photography. For the display the smartwatch has a 2.4″ inch screen, a 480 x 640 pixel resolution with 333PPI. It is a sharp display, with good resolution screen display. Based on its description, the wearable has a high retina display, high definition screen display.

It has a dual camera, having an 8 MP side camera and 2 MP front camera for selfies and video conversation. The front camera also supports face unlocking, which makes it convenient if you want to unlock your smartwatch.

Features included in the device are multi-sport mode, having at least 9 professional sport mode, with support for GPS, GLONASS, AGPS. It also has Google Apps support, you can download a variety of popular apps, download it via Google Play.

Why We Like it

  • Easy to Access menus
  • Dual Camera
  • Medium size wide screen display
  • Large Battery Capacity
  • A good alternative for your smartphone
TicWris Max S Smartwatch Specifications at a Glance

Display: 2.4” inch IPS LCD Screen with full touch operation

Processor: MT6739 Quadcore processor

Memory: 3 GB and 32 GB version

Camera: 8 MP side camera, 2 MP front camera

Connectivity: 4G nano SIM, WIFI, Bluetooth 4.0

Battery: 2000 mAh battery

Preloaded and eSIM Smartwatches

Samsung Galaxy Watch 3 4G LTE – Premium with Easy to use Menus 

Still one of the most versatile smartwatch in the market, the Galaxy Watch 3 4G LTE is one of the popular from the list and with the most reliable LTE smartwatch in the market.

Premium design, having a sporty body with military-grade durability that is dust and water-resistant. Full packed smartwatch with two physical button on the side. In terms of design, the Samsung Galaxy Watch 3 4G LTE looks sporty and its bezel and body case if much slimmer compared to the previous Galaxy Watch is a bit bulkier. It is the first titanium Galaxy watch according to Samsung, beautifully crafted with a beautiful finish.

Samsung Galaxy watch 3

The smartwatch is packed with high definition screen display. It has a super AMOLED screen with its 1.4″ inch display, 360 x 360 pixel resolution with always-on display. It is protected by a Corning Gorilla Glass DX which is more durable compared to other tempered glass.

Just like previous Galaxy smartwatches, the wearable is packed with health sensors. It has heart rate monitoring, ECG function, with improved accuracy according to Samsung. There is a version for blood pressure but seems like this is limited to in few countries only

Other health functions included are meditation feature, stress, breathing guide, as well as sleep monitoring.

With its connectivity, the smartwatch is equipped with WIFI and Bluetooth connectivity. Regarding the 4G LTE, the smartwatch has a preinstalled SIM supporting GSM/HSPA/LTE.

Unlike other smartwatches brand, the Galaxy Watch 3 runs its own homegrown OS, the Tizen 5.0. It is fast, packed with intuitive UI which makes it easy to navigate on its menus. Of course its main feature of the Tizen OS is the support for the rotating bezel which is unique to Samsung smartwatches, it is easier to navigate and enjoyable to use compared to a full touch screen navigation only.

Why We Like it

  • Durable make, premium look and materials
  • Rotating Bezel
  • Accurate positioning system with its multiple GPS support
  • Fast and Optimize Operating System
  • Packed and precise health sensors

Samsung Galaxy Watch 3 4G LTE Specifications at Glance

Display: 1.4″ inch AMOLED, 360 x 360 pixels with full touch operation

OS: Tizen OS for Wearable

Processor: Exynos 9110 (10 nm), Dual-core 1.15 GHz Cortex-A53

Memory: 1 GB and GB

Connectivity: 44G LTE FDD, BT v4.2+ BLE, WiFi IEEE 802.11 b/g/n

Battery: 340 mAh battery

4G LTE Connectivity: eSIM

TicWatch Pro 4G smartwatch – Amazing Technology Display, Long Battery Life

Check this outdoor sport smartwatch from Mobvoi, the Ticwatch Pro 4G/LTE. The smartwatch received a good design award last 2019. It has an outdoor design, with premium materials. The Ticwatch Pro has a watch case made of polyamide and glass fiber with stainless steel bezel and aluminum back cover.

The wearable has a MLT-STD-810G US military standard rating. With this, the IP68 smartwatch rating can withstand sand and dust and water, it also survives temperature shock as well as pressure shock.


One of the main features of the smartwatch that sets it apart from other wearable is its displayed technology. The smartwatch has a dual-layered technology, 1.39” inch, an FSTN screen is sitting on top of the AMOLED screen. With this, the lower power display that serves as an always-on display (essential mode) consumes less power. While the AMOLED is only activated (smart mode) when the user access the menus and functions of the smartwatch. With this method, the smartwatch lasts up to 30 days with battery saver LCD.

Just like the above smartwatches the wearable is equipped with different connectivity. The TicWatch Pro 4G LTE smartwatch has Bluetooth version 4.2+ BLE, a WIFI iEEE 802.11 b/g/n. For its 4G LTE FDD, the wearable has a preloaded SIM provided by Verizon. I guess if you wants some independent connectivity, you are stuck with Verizon, which is not really a bad thing.

Anyways, the smartwatch is fast with its latest processor, the Qualcomm® Snapdragon Wear™ 2100. It has 4 GB of ROM and 1 GB of RAM. For its sensors, it is packed with PPG heart rate sensor, accelerometer, gyroscope, e-compass, ambient light sensor, low latency off-body sensor.

With regards to the above hardware, the smartwatch is loaded with independent calls and message functions with its cellular connectivity. Running Wear OS by Google, it has a variety of apps available, you can download from Google Play for more functions. For its fitness functions, the smartwatch has TicMotion, ProActive motion tracking, monitoring your health and fitness activities. Additional notable functions are Google Assistant, as well as NFC payments.

Why We Like it

  • Dual Layer Screen Display, Power Saving Screen
  • Military Standard durability
  • Wear OS operating system, comprehensive apps available for download
  • Long Battery Life in Essential Mode

Ticwatch Pro 4G/LTE Smartwatch Specifications at a Glance

Display: 1.39″ inch AMOLED + FSTN LCD 400 x 400 pixels with full touch operation

OS: Wear OS

Processor: Qualcomm® Snapdragon Wear™ 2100

Memory: 1 GB and 4 GB

Connectivity: 4G LTE FDD, BT v4.2+ BLE, WiFi IEEE 802.11 b/g/n

Battery: 415 mAh battery

4G LTE Connectivity: ePreloaded SIM

Fossil Gen 5 LTE Smartwatch – Classy Fashionable Wearables

Here is the latest smartwatch loaded with LTE support from Fossil. The Fossil Generation 5 LTE, still it is elegant looking with clean, glossy body durable make with slim bezel on the side. Its smartwatch is available in silicon and leather strap, there is also a premium steel strap for those who are looking for an office type casual/corporate look.

With upgraded hardware, the smartwatch sport the following features. Receive messages and calls untethered from your phone, it provides clear and crisp sound with its built-in speaker. Store music on your smartwatch and control it, play, stop, forward with its music control.

For its health and fitness functions, the Fossil Gen5 LTE, the smartwatch has heart rate monitoring, as well as activity tracking. With support for Google Fit, you can synchronize your activity to have a comprehensive record of your activities.

It runs the Wear OS by Google, download available apps or use the loaded apps in the smartwatch such as Nike Run Club, Hand Wash Timer, Spotify, Cardiogram. If you need more apps, you can download it directly from Google Play store.

One of the latest feature, added to the Fossil smartwatch is the multi-battery mode that is not available in previous smartwatches. The feature gives the smartwatch a much longer battery life compared to the usual. The Fossil Gen 5 has “Daily Mode”, “Extended mode”,”Time Only Mode”,”Custom Mode” which gives the wearable a longer battery life depending on the option.

The smartwatch is one of the most advance in the public with support for connected technologies. It supports Toyota Remote Connect, with your smartwatch, you can start or stop the engine of your car from your wrist. Control Home device, with the speaker, it has voice activated support control the smart devices on your home.

Why We Like it

  • Premium Fashionable Design
  • Always On Display
  • Hands FREE Google Pay
  • Variety of Apps Available in Google Play
  • Multi-Day Battery Mode

Fossil Gen 5 LTE Smartwatch Specifications at a Glance

Display: 1.3″ inch AMOLED 416 x 416 pixels with full touch operation

OS: Wear OS

Processor: Qualcomm® Snapdragon Wear™ 3100

Memory: 1 GB and 8 GB

Connectivity: 4G LTE FDD, Bluetooth, WiFi IEEE 802.11 b/g/n

Battery: 400 mAh battery

4G LTE Connectivity: ePreloaded SIM Verizon

Apple Watch Series 6 LTE Smartwatch – Premium Loaded with Apps and Functions

Apple Watch Series 6 LTE Version, I guess no need to explain why the Apple Watch 6 is included in our list. It is the most popular smartwatch in the market whether its LTE or non-LTE version, according to the latest sales report, Apple still dominated the global smartwatch sales.

It has several versions of series 6, but we are interested more on GPS + cellular version. With it, you can now make calls, receive and send messages independent of your smartphone. Unlike Fossil and Ticwatch, the Apple Watch supports several carries like AT&T, Verizon, Sprint Tmobile and Tmobile.


Just like the GPS version of series 6, the wearable has premium design, having a durable lightweight aluminum case with regular sport band. It has a beautiful always on retina LTPO OLED display with full-touch operation. It is protected by a tempered glass, options are sapphire crystal glass and iOn X glass display.

According to Apple, it is much faster and more processing power with its S6 SiP 64 bit dual core processor. Features available in the smartwatch are blood oxygen sensor; electrical heart sensor and third-generation optical heart sensor with ECG. Similar to Wear OS smartwatches, the Apple Watch series 6 with its own ecosystem has a variety of features. This includes Siri support, Apple Pay, Map support, variety of sports and fitness apps.

Why We Like it

  • Always On Display Retina Display
  • Variety of Carrier Support
  • Premium Design and Material
  • Rich Ecosystem
  • OTA support

Apple Watch 6 LTE Smartwatch Specifications at a Glance

Display: 1.78″ inch AMOLED 448 x 368 pixels with full touch operation

Operating System: Watch OS 7.0

Processor: Apple S6

Memory: 1 GB and 32 GB

Connectivity: GSM / HSPA / LTE, Wi-Fi 802.11 b/g/n, dual-band, Bluetooth 5.0, A2DP, LE.

Battery: 308 mAh battery

4G LTE Connectivity: eSIM

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